Boiler



July 1 .1931.

F. M. CARON Filed June 25, 1928 2 Sheets-Sheet 2 I N V EN TOR.

BY W f ATTORNEYS.

Patented July 14, 1931 UNITED STATES PATENT oFFIcE FRED M. GABON, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO RICHMOND LEWIS,

OF SPRINGFIELD,

MASSACHUSETTS BOILER Application filed June 25,

My invention relates to boilers and has particular reference to a boiler adapted for the heating of houses by either steam, vapor, or hot water. One object of the invention is 1 5 the provision of a boiler of this character which will be sufliciently eflicient to permit its use with illuminating gas as the heating medium. Another object of the invention is to provide a boiler which will be sufficiently 1o sensitive and responsive to quick changes in the supply of fuel to give improved results in automatic regulation of the steam pressure or house temperature. A further object is to provide improved pre-heating means for the 15 water returned from the circulating system.

A further object is to prevent the accumulation of sediment in the boiler. A further object is to provide improved means for shut ting off the supply of fuel if the water in the E boiler becomes exhausted. Other and further objects will appear from the following description and claims.

Referring to the drawings:

Fig. 1 is a vertical section of the boiler 35 embodying my invention;

Fig. 2 is a: fragmentary side elevation, part- 1y broken away;

Fig. 3 is a section on' line 33 of Fig.

Fig. 4 is a section on line 4-4 of Fig. 1; 30 and Fig. 5 is a section on line 5' 5 of Fig. 4.

In the drawings, the boiler has been shown as supported upon a base from which arise casing walls 11 forming the shell of the boiler proper. Horizontal walls 12 and 13 form respectively the bottom and the top of the boiler, a space underneath the wall 12 being provided for a burner 14, preferably of the gas type. This burner is supplied with fuel by a pipe 15 under the control of a valve or valves 16, as will be later described. A steam dome 17 is coupled by pipes 18 to the chamber 19 formed by the walls 11, 12 and 13.

Extending between the walls 12 and 13 are fire tubes 20 opening at their lower ends into the space immediately above the gas burner and at their upper ends into a space 21 between the wall 13 and the steam dome 17. The hot gases from the burner pass through 1928 Serial No. 288,255.

the fire tubes into the space 21 and from there into a space '22 between the steam dome and an outer casing" 23, superheati ng the steam so that it is dry as it leaves the boiler.

From the space 22, the gases are conducted I to the chimney in the usual manner by a flue 24.

Extending through the bottom wall 12 are a plurality of J-tubes, each comprising a- The curved portions 27 of the tubes reach below the wall 12 directly into the hot gases above the burner 14. i

' The action of these J-tubes is two-fold. In the first place, since they extend into the hottest portion of the flame, steam is generated in them very rapidly. This steam escapes into the chamber'19 below the water level and causes the water to be agitated violently, throwing it not only upon the surfaces of the fire tubes 20 but upon thehot walls 11 and 13. This secondary action greatly in creases the amount of surface available for the generation of steam and improves not only the efficiency of the boiler but the rapidity with which steam can. be generated. 1

' In'the space between the walls 11 and the outer casing 23 are mounted two chambers 30, each extending in an are slightly less in extent than a semi-circumference. At their upper ends these chambers are connected to the return pipes 31 of the heating-system, and

at their lower ends are provided with drains 32 by which sediment may be removed. As shown in Fig. 4, these chambers are cut away as at 33 to permit of their being joined to the chamber 19 by an .elbow pipe 34.

These chambers are positioned between the walls 11 and 23 so as to have a free space upon all sides. Holes are formed within the casing walls 11 at a point below'the walls 12 and permit the passage of gases into the space 46 surrounding the chambers 30. Holes 47 in a plate 48, positioned above and supporting the chambers 30, permit the gases coming through the holes L5 to pass into the upper chamber 22 and thence to the flue 24:.

At the rear of the boiler, the chambers 30 are separated leaving a space 35 through which passes a tube 36 joining the two casing walls 11 and 23. A fusible plug 37 (best shown in Fig. 2) is positioned at the inner end of this tube and normally holds a rod 38 which passes through the tube and is connected by a cord 39 with a lever 40 mounted upon and operating the valve 16. A spring 41 is strained between the lever 40 and a stationary part of the valve so that if the plug 37 is melted, as it will be in case the water in the boiler drops below a predetermined level, the valve 16 will be closed and the supply of fuel thus shut off.

Various changes in the proportions and the arrangement of the parts may be made without departing from the scope of the invention as set forth in the accompanying claims.

What I claim is:

1. A boiler having a water-containing casing, a fire boxbeneath said casing, an outer casing surrounding both the water-containing casing and the fire box and connected to the fire box to receive hot gases therefrom, and a water chamber connected to the water containing casing adjacent the bottom of the latter and positioned between the two casings at a level partly above and partly below the bottom of the water-containingcasing to form a preheating and sediment collecting reservoir.

2. A boiler having a water-containing casing, a fire box beneath said casing, an outer casing surrounding both the water-containing casing and the fire box and connected to the fire box to receive hot gases therefrom, a water chamber connected to the water-containing casingand positioned between the two casings so as to be subjected on all sides to the gases from the fire box, said water chamber being formed in arc-shaped segments, a tube joining the two casings and passing between the segments of the water chamber, a fusible member at the inner end of the tube, and fuel controlling mean-s extending through the tube adapted to shut off the supply of fuel in the event of fusion of the member.

3. A boiler comprising a casing, a plurality of fire tubes extending through the casing and grouped centrally of the casing to leave a substantial space between the walls of the casing and the group of fire tubes, a plurality of J-shaped tubes positioned in the bottom of the casing between the walls of the casing and the group of fire tubes, the short arm of each J-tube opening into the casing flush with the bottom thereof, the curved portion of each J-tube extending downwardly outside of the casing to receive the direct action of the fire and the long arm of each J-tube extending upwardly into the interior of the casing and terminating short of the water level, said J-tubes being sufficient in number and so spaced from each other and the walls of the casing and the fire tubes as to uniformly agitate the water in the casing and cause it to be thrown against the sides of the casing and the fire tubes at points above the normal water line.

In testimony whereof I have affixed my signature.

FRED M. GABON. 

